These readings are cultural, to help you develop some perspective
on the role of functional languages and functional programming in
real-world software development. Many of the articles refer to Lisp,
a close cousin of Scheme.

An article by
Paul Graham describing how
and why he (and a colleague) used Lisp to write the software for what
is (now) Yahoo! Store.

Paul Graham's site has number of other articles discussing
advantages of using Lisp in programming projects.